Episode 93 — Disk full puzzles: filesystem full vs inode exhaustion vs runaway logs

Linux+ frequently uses “disk full” as a puzzle because the same error message can come from different constraints, and the correct fix depends on which constraint is actually exhausted. This episode clarifies three common causes: true filesystem capacity exhaustion, inode exhaustion caused by too many files, and runaway logs that consume space rapidly in high-churn paths. You’ll learn how exam questions hide the real cause in small clues like “many tiny files,” “log directory growing,” or “deleted files didn’t free space,” and why a professional response starts with confirming what is full and where. The objective is to make you faster at distinguishing symptoms, so you don’t waste time resizing storage when cleanup is enough, or deleting logs when the inode table is the real limit.

we apply a practical mental checklist for solving disk full puzzles. You’ll practice verifying capacity and inode usage separately, then identifying the top-consuming directories and files, and checking whether open file handles are retaining deleted space. We also cover operational best practices: implement retention and rotation, isolate high-churn directories onto separate filesystems, and monitor growth rates so you detect patterns before they become outages. Finally, you’ll learn how the exam expects you to troubleshoot safely: avoid deleting blindly, prefer targeted cleanup with evidence, and validate that the system returns to stable behavior after remediation, including confirming that log growth or file churn won’t refill the disk within hours. Produced by BareMetalCyber.com, where you’ll find more cyber audio courses, books, and information to strengthen your educational path. Also, if you want to stay up to date with the latest news, visit DailyCyber.News for a newsletter you can use, and a daily podcast you can commute with.